Password isn’t working with your account when you try to sign in

If you have two-step verification on your Microsoft account, be sure to create a new app password to use with your account. See About two-step verification.

Also, make sure you have the Remember my password box checked when you sign in to your account in an Xbox 360 game.

Xbox One requires you to clear space on the internal hard drive for Xbox 360 games on an external storage device

You can install Xbox 360 games to an external storage device, but in order to play these games on your Xbox One console, you need to free up to 4 GB of space on the Xbox One internal drive, with an additional 256 MB of space per Xbox 360 game that you want to use.

To remove all Xbox 360 games and profiles that have been saved to the internal hard drive, follow these steps:

Press the Xbox button to open the guide.
Note Double-tapping the Xbox button will open the guide from any other screen on the console.

Go to System > Settings.

Select System and then select Storage.

Select Clear local Xbox 360 storage.

Select Yes and restart the console. This will not affect your cloud saved games or Xbox One games and profiles.

How to locate a digital license for an Xbox 360 game that you own

If you have the digital license for the Xbox 360 game and it’s available to be played on the Xbox One, the game will appear in the Ready to Install section of My games & apps.